Potato spindle tuber diseases is caused by a

I. DJ Ivanowsky (1892) recognised certain microbes as causal organisms of the mosaic disease of tobacco

II. MW Beijerinck (1898) demonstrated that the extract of infected plants of tobacco could cause infection in healthy plants and called the fluid as contagium vivum fluidum

III. WM Stanley (1935) showed that these microbes could be crystallised and crystals consist largely of protein

The above statements are assigned to

Protein coat of a virus enclosing nucleic acid is called

Which of the following phenomenon proves that viruses are living?

Enzymes are absent in

Which of these is NOT caused by a prion?

Pick out the wrong statement

I. DJ Ivanowsky (1892) recognised certain microbes as causal organisms of the mosaic disease of tobacco

II. MW Beijerinck (1898) demonstrated that the extract of infected plants of tobacco could cause infection in healthy plants and called the fluid as contagium vivum fluidum

III. WM Stanley (1935) showed that these microbes could be crystallised and crystals consist largely of protein

The above statements are assigned to

Single stranded nucleic acid is found in

Lichen is the pioneer vegetation on which succession?

Tobacco mosaic virus is